Chemistry of inorganic compounds – Carbon or compound thereof – Elemental carbon
Reexamination Certificate
2006-02-14
2006-02-14
Hendrickson, Stuart L. (Department: 1754)
Chemistry of inorganic compounds
Carbon or compound thereof
Elemental carbon
C977S726000
Reexamination Certificate
active
06998103
ABSTRACT:
Method for producing carbon nanotubes. Carbon nanotubes were prepared using a low power, atmospheric pressure, microwave-generated plasma torch system. After generating carbon monoxide microwave plasma, a flow of carbon monoxide was directed first through a bed of metal particles/glass beads and then along the outer surface of a ceramic tube located in the plasma. As a flow of argon was introduced into the plasma through the ceramic tube, ropes of entangled carbon nanotubes, attached to the surface of the tube, were produced. Of these, longer ropes formed on the surface portion of the tube located in the center of the plasma. Transmission electron micrographs of individual nanotubes revealed that many were single-walled.
REFERENCES:
patent: 4663230 (1987-05-01), Tennent
patent: 5707916 (1998-01-01), Snyder et al.
patent: 5989648 (1999-11-01), Phillips
patent: 6221330 (2001-04-01), Moy et al.
patent: 6261484 (2001-07-01), Phillips et al.
patent: 6306564 (2001-10-01), Mullee
patent: 6333016 (2001-12-01), Resasco et al.
patent: 6346189 (2002-02-01), Dai et al.
patent: 6385291 (2002-05-01), Takami
patent: 6400088 (2002-06-01), Livingston et al.
patent: 6413487 (2002-07-01), Resasco et al.
patent: 6417265 (2002-07-01), Foulger
patent: 6419717 (2002-07-01), Moy et al.
patent: 6422450 (2002-07-01), Zhou et al.
patent: 6426590 (2002-07-01), Chung et al.
patent: 6428134 (2002-08-01), Clark et al.
patent: 6437329 (2002-08-01), Yedur et al.
patent: 6440761 (2002-08-01), Choi
patent: 6445006 (2002-09-01), Brandes et al.
Qin, L. C., et al., “Growing Carbon Nanotubes by Microwave Plasma-Enhanced Chemical Vapor Deposition” Jun. 29, 1998, Applied Physics Letters, vol. 72, No. 26, pp. 3437-3439.
Nikolaev, P., et al., “Gas-Phase Catalytic Growth of Single-Walled Carbon Nanotubes from Carbon Monoxide” Nov. 5, 1999, Chemical Physics Letters, vol. 313, pp. 91-97.
S. Iijima, “Helical Microtubules of Graphitic Carbon,” Nature, vol. 354, pp. 56-58 (1991).
S. Iijima, “Single-shell Carbon Nanotubes of 1-nm Diameter,” Nature, vol. 363, pp. 603-607, (1993).
A. Thess et al., “Crystalline Ropes of Metallic Carbon Nanotubes,” Science.
C. Journet et al., “Production of Carbon Nanotubes,” Appl. Phy. A., vol. 67, pp. 1-9, (1998).
E. G. Rakov, “Method for Preparation of Carbon Nanotubes,” Russ. Chem. Rev., vol. 69, No. 1, pp. 35-52, (2000).
M. Okai et al., “Structure of Carbon Nanotubes Grown by Microwave-Plasma-Enhanced Chemical Vapor Deposition,” Appl. Phys. Lett., vol. 77, No. 21, pp. 3468, (2000).
H. M. Cheng et al., “Large-Scale and Low-Cost Synthesis of Single-Walled Carbon Nanotubes by the Catalytic Pryolysis of Hydrocarbons,” Appl. Phys., vol. 72, No. 25, pp. 3282-3284, (1998).
H. M. Cheng et al., “Bulk Morphology and Diameter Distribution of Single-Walled Carbon Nanotubes Synthesized by Catalytic Decomposition of Hydrocarbons,” Chem. Phys. Lett., 289, pp. 602-610, (1998).
H. Dai et al., “Single-Wall Nanotubes Produced by Metal-Catalyzed Disproportionation of Carbon Monoxide,” Chem. Phys. Lett., 260, pp. 471-475, (1996).
H. Shim et al., “Restructuring of Alumina Particles Using a Plasma Torch,” J. Mater. Res., vol. 14, No. 3, pp. 849-854, (1999).
C. K. Chen et al., “Low-Power Plasma Torch Method for the Production of Crystalline Spherical Ceramic Particles,” J. Mater. Res., vol. 165, No. 5, pp. 1256-1265, (2001).
P. M. Ajayan, “Carbon Nanotubes,” Handbook of Nanostructured Materials and Nanotechnology, vol. 5, pp. 375-406, (2000).
J. Sloan et al., “Encapsulation and Crystallization Behavior of Materials Inside Carbon Nanotubes,” Handbook of Nanostructured Materials and Nanotechnology, vol. 5, pp. 407-432, (2000).
X. Wang et al., “Synthesis of Multi-Walled Carbon Nanotubes by Microwave Plasma-Enhanced Chemical Vapor Deposition,” Thin Solid Films 390, pp. 130-133, (2001).
Y. Ando et al., “Arc Plasma Jet Method Producing Single-Wall Carbon Nanotubes,” Diamond and Related Materials 10, pp. 1185-1189, (2001).
P. Nikolaev et al., “Gas-Phase Catalytic Growth of Single-Walled Carbon Nanotubes from Carbon Monoxide,” Chem. Phys. Lett. 313, pp. 91-97, (1999).
B. Kitiyanan et al., Controlled Production of Single-Wall Carbon Nanotubes by Catalytic Decomposition of CO on Bimetallic Ci-Mo Catalysts., Chem. Phys. Lett. 317, pp. 497-503, (2000).
Chen Chun-Ku
Perry William L.
Phillips Jonathan
Borkowsky Samuel L.
Hendrickson Stuart L.
Stadler Rebecca M.
The Regents of the University of California
LandOfFree
Method for producing carbon nanotubes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing carbon nanotubes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing carbon nanotubes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3641608